Britain's Dan Evans reached the last 16 of the Qatar Open with a straight-set win over Egor Gerasimov.
He faces Tunisian qualifier Malek Jaziri or Spaniard Alejandro Davidovich Fokina in the next round in Doha.
Fifth seed Evans could yet face a quarter-final against Andy Murray, who received a wildcard to compete.
Fellow Briton Murray, a three-time Grand Slam winner, faces an opening match on Tuesday against Taro Daniel, the Japanese player who beat him in the second round of the Australian Open.
If Murray gets through, he will face Spain's Roberto Bautista Agut, the tournament's second seed, in the last 16.